By William C. Haneberg, Peter S. Mozley, J. Casey Moore, Laurel B. Goodwin
Published by way of the yank Geophysical Union as a part of the Geophysical Monograph Series.
This quantity bargains a pattern of the variety of analysis on faults and fluid move within the past due Nineteen Nineties. It describes specified floor and subsurface characterization of fault-zone constitution and diagenesis with implications for hydrology and petroleum geology; the function of faults in geothermal platforms; laboratory stories of rock mechanics, permeability, and geochemistry of faults and fault rocks; and mathematical modeling of fluid move via faulted and fractured rocks.
The such a lot awesome and beautiful characteristic of the amount, in addition to the final examine subject of faults and subsurface fluid move, is its interdiscplinary nature. The authors are drawn from the fields of structural geology, engineering geology, geohydrology and hydrogeology, sedimentology, petroleum geology, geothermal geology, rock mechanics, and geochemistry. Likewise, the emphasis on faults instead of uncomplicated open fractures increases concerns now not addressed in a lot of the literature on stream via fractured rocks. even though faults are one of those fracture and semantics can confuse the problem, faults are in general extra advanced than the straightforward fractures which are the focal point of so much paintings in fractured rock hydrology. so much significantly, faults could have very huge displacements (up to many kilometers) and improve advanced tectonic materials, gouge zones, and juxtaposition of rocks or sediments of other types.
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Additional resources for Faults and Subsurface Fluid Flow in the Shallow Crust
Boundaries of the ~10 cm wide core zone fall between the arrows showing shear sense. Sand ribbons in core (s) are partially cemented with micritic calcite. Both sand and clay are foliated, but both fault parallel and inclined foliations are more visible in clay ribbons, (e) Close-up of hand sample of clay-rich core. Sand grains and blobs (s) are clearly visible in the clay. Fault-parallel (subhorizontal in this photo) and inclined foliations are marked with arrows. zones also emphasizes the fact that displacements greater than bed thickness can juxtapose beds with different perme abilities, which may significantly impact fluid flow.
1980. Bouvier, J. , K. Sijpesteifn, D. F. Kluesner, C. C. Onyejekwe, and R. C. Van der Pal, Three-dimensional seismic interpretation and fault sealing investigations, Nun River field, Nigeria, AAPG Bull, 73, 1397-1414, 1989. , Model for episodic flow of high-pressure water in fault zones before earthquakes, Geology, 21, 303-306, 1993. Caine, J. , D. R. Coates, N. P. Timoffeef, and W. D. Davis, Hydrogeology of the Northern Shawangunk Mountains, New York State Geol. Surv. Open-File Report l-G-806, 1991.
Where present, cement in the footwall mixed zone is generally diffuse, micritic calcite; it occurs only where the mixed zone is sand and/or gravel. Sparry calcite cement is rare. Microscopic Deformation 41 Features The petrographic work presented below has been focused on sediments within the footwall mixed zone because: 1) with the inferred NW to SE paleo-flow pattern, the footwall mixed zone would have been the first strongly deformed fault-zone material encountered by flowing groundwater 2) the mixed zones exhibit a variety of structures, including features mesoscopically similar to those found in both the damage and core zones, and 3) the footwall mixed zone is generally better exposed than the hanging wall mixed zone.
Faults and Subsurface Fluid Flow in the Shallow Crust by William C. Haneberg, Peter S. Mozley, J. Casey Moore, Laurel B. Goodwin